| Component | LiteLLM |
| Severity | high (CVSS 7.7) |
| CVSS vector | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N |
| Published (NVD) | 2026-09-25 |
| Last modified | 2026-10-01 |
| Affected versions | < 1.101.0-rc.1 < 1.101.0-rc.1 read from the advisory text: NVD has not published CPE data yet |
| Fixed in | 1.101.0-rc.1 |
| Weakness | CWE-863 |
| CISA KEV | not listed |
NVD description
BerriAI LiteLLM before 1.101.0-rc.1 contains a tenant isolation bypass vulnerability in the semantic cache layer that allows authenticated users to read other tenants' cached responses by exploiting a metadata key mismatch between _get_semantic_cache_tenant_scope() and _get_metadata_variable_name(). Attackers holding a valid virtual key can submit semantically similar prompts on affected routes such as /v1/responses and /bedrock/* to retrieve cached responses containing other tenants' personally identifiable information, financial data, or source code, and can cause agentic front-ends to auto-execute attacker-supplied tool calls under victim credentials by returning cached function_call or tool_calls payloads to a different principal.
What to do
- Upgrade LiteLLM to
1.101.0-rc.1or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-89032
- https://github.com/BerriAI/litellm/commit/16db51e2cfc28e02bd460481e634a8403ea9265e
- https://github.com/BerriAI/litellm/pull/39590
- https://github.com/BerriAI/litellm/releases/tag/v1.101.0-rc.1
- https://www.vulncheck.com/advisories/berriai-litellm-rc-1-tenant-isolation-bypass-via-semantic-cache-layer
Read more
Other LiteLLM CVEs
A vulnerability has been found in BerriAI LiteLLM up to 1.94.0. This affects the function get_secret of the file secret_managers/main.py of...
A flaw has been found in BerriAI LiteLLM up to 1.95.0. Affected by this issue is the function ui_view_session_spend_logs of the file litellm...
LiteLLM contains a weak authentication vulnerability that allows an attacker holding a valid JWT from the configured identity provider to au...
LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.83.9, an authenticated LiteLLM Proxy caller...
LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to versions 1.88.6 and 1.96.2, any authenticated...
BerriAI litellm <=1.82.4 is vulnerable to Server-Side Template Injection (SSTI), which allows unauthenticated remote attackers to execute ar...